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β‐Radiation Detected Li Diffusion in the Fast Ionic Conductor Li 3 N
Author(s) -
Bader B.,
Heitjans P.,
Ackermann H.,
Freiländer P.,
Kiese G.,
Schirmer A.,
Stöckmann H.J.,
van der Marel C.
Publication year - 1985
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19854970210
Subject(s) - ionic bonding , diffusion , relaxation (psychology) , radiation , nuclear magnetic resonance , conductor , ion , materials science , condensed matter physics , physics , optics , thermodynamics , quantum mechanics , social psychology , psychology , composite material
The method of β‐radiation detected nuclear magnetic resonance (β‐NMR) was applied to 8 Li in a 7 Li 3 N single crystal. From NMR signals and spin‐lattice relaxation rates the activation enthalpies for two distinct Li + diffusion processes were deduced. Ultraslow diffusion corresponding to ionic jump rates down to 0.1 s −1 was observed. It could be confirmed that the static electric field gradients at the two inequivalent Li sites have opposite signs.